R. Robertson, G. F. Black, and J. Struthers, “Notice of the Discovery of a Stone Cist and Urns at the Cuninghar, Tillicoultry;: With Notes on the Contents and the Sculptured Covering Stone of the cist; and on the Microscopical Examination of the Fibrous or Hairy Substance found in the Cist”, PSAS, vol. 29, pp. 190–197, Nov. 1895.